Re: what ports does sendmail /popper use?
From: Matt Barton (nerd@netmonkey.net)Date: 05/28/02
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From: Matt Barton <nerd@netmonkey.net> Date: Mon, 27 May 2002 20:30:56 -0500
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On Mon, 27 May 2002, mischa wrote:
> I know sendmail uses tcp 25 and pop is on 110 tcp
>
> but when i block all other ports my mail server fails. i get an error
> along the lines htat it cant resolve the domain. 53 is also open? does
> it need to have anothr port open? the udp ports?
DNS uses 53/tcp and 53/udp. If you have a publicly available DNS server,
you should open up 53 for both protocols.
- --
Matt Barton nerd@netmonkey.net
Indianapolis, IN http://www.mattbarton.ws/
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